What were you doing when the UFO landed?

当不明飞行物着陆时，你正在干啥？

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The boy was walking down the street when the UFO landed.

当飞碟着陆时，那个男孩正在街上走。

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While the boy was walking down the street, the UFO landed.

当ufo着路的时候，这个男孩正沿着街走。

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As for the Roswell incident, nearly two-thirds of the respondents to the poll said they believed that a UFO crash-landed in a field outside the New Mexico town 50 years ago next month.

CNN: Poll: U.S. hiding knowledge of aliens

Mark Briscoe is the library director of the UFO Museum and, unsurprisingly, has no doubt that aliens landed here.

BBC: New Mexico��s alien nation